Why is the game engine split into 2 windows?

When I opened unity, for some reason, the scene part of the game engine was on a separate window from the game and animator, I need to get it back on one screen, thanks!

The scene view is where you create the game. The Game view is where the game is presented to you when you press the Play button. If you want to have these views together, just click the tab and drag to where you want one to go.

no, the two scenes are two separate windows, not just 2 separate tabs, I can view them both at once

You can just click on tab with name (game,scene…) and drag it where you want, you can drag into unity, or you can drag tab out of unity to have separate window.